DISTRIBUTIONAL ADDITIWS FOR SONfE ILLINOIS VASCULAR PLANTS R. D. Henry and A. R. Scott M. Myers Herbarium and Institute for Environmental Management Western Illinois University, Macomb 61455 ABSTRACT Two hundred fifty-eight Illinois vascular plant species county distribution additions are reported. Additionally are also included some collections of fifteen varieties, seventeen forms and thirteen non-nomenclatural variants. INTRODUCTION As part of a continuing effort to update the spontaneous Illinois vascular plant flora, we report 258 county species distribution additions as determined mainly from Mohlenbrock and Ladd fl978), Mohlenbrock (1985) and Ladd and Mohlenbrock (1983) . Nomenclature mainly follows Mohlenbrock (1975) and the taxa are listed alpha-betically. Each plant is annotated with the county collected in, the collection number(s) of Henry and Scott or if another collector their name and collection number and in a few cases a brief remark concerning the plant. Voucher specimens are deposited in the R. M. Myers Herbarium of Western Illinois University (MWI) . Also, in addition, are included in this report collections of 15 varieties, 17 forms and 13 non-nomenclatural variants of which eight are flower color, one flower morphology, one vivipary, one leaf morphology and two gigantism. We would like to gratefully acknowledge the Western Illinois University Institute for Environmental Management, the W.I.U. Research Council, the Central Illinois Light Company and the Illinois Department of Transportation for financial support during the course of this project. LIST OF SPECIES Abut i Ion thcophrasti Ailanthus altissima Brown (1250) Mason (1278) Schuyler (1259) Schuyler (1258) Acer nigrum Alliaria officinalis Pike (5071, 5397) Fulton (4556, 4557, 4558, 4559) 159
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